Explain how mitochondrial DNA studies of Africans and Europeans support the replacement model for the evolution of modern humans.
What will be an ideal response?
Answers may vary. A study of mitochondrial DNA performed several years ago showed that the mitochondrial DNA of Africans is more diverse than the mitochondrial DNA of the people in Europe (and the rest of the world). Since mitochondrial DNA has a constant rate of mutation, Africans should show greater diversity, since modern humans have existed the longest in Africa. The raw data indicates a closer genetic relationship among all Europeans than among Africans. This, too, supports the model.
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A. is a course health workers must take. B. are guidelines from WHO for dealing with emerging diseases. C. are instructions on the care of all patients. D. are guidelines to use with patients infected with a highly transmissible or epidemiologically important pathogen.
The basic cells that the body uses for rapid communication and control are
a. neurons. b. neuroglia. c. chondrocytes. d. formed elements. e. nerves.
Molecular chaperones are proteins that mediate the folding process of:
a. other proteins. b. amino acids. c. lipids. d. DNA. e. sugars.
Species present in the regional species pool are sorted into local communities based on their adaptations (to conditions of the environment and to finding suitable resources) and interactions with other species. The result is often that the __________ niche represents a restricted subset of ranges and conditions represented in the __________ niche.
A) fundamental, realized B) realized, fundamental